What minerals is rich in Germany?

Germany cannot be called a country rich in minerals. The country has only significant coal reserves. There are brown and hard coal. Still in Germany significant deposits of rock salt. Oil and natural gas are present in the bowels of Germany, but their quantity is very small. Iron ore deposits are large-scale, but its quality is very low, so its mining is irrelevant. In insignificant volumes there are deposits of salts of magnesium and potassium.